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Thread: Ahhhh my flat tracker is driving me nuts, 35mm PWK

  1. 10-20-2006, 03:18 PM #1
    Billy Golightly's Avatar
    Billy Golightly
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    Ahhhh my flat tracker is driving me nuts, 35mm PWK

    Well it runs but not very well, I dunno whats going on with it. I'm running a #55 pilot jet, DGK needle on the second from the bottom groove, and a 150 main. It keeps acting like its running out of gas in the low and mid. Not like a running lean revving real easy to the moon, but more like a 4 stroke does when it runs out. Hit and miss, and hit the throttle and it pauses before it revs. Plug reads dark, and it smokes like crazy. If I go leaner on the pilot or needle the smoke goes away some but it runs worse and will just miss and die sometimes. Its almost like the float is screwing up and not letting fuel in sometimes but it seems to be fine when I'm wide open so I doubt thats it. It just doesnt "feel" rich when its acting up, its weird. I had to switch from the original PJ because the entire choke assembly pulled out of it, and I had this carb on the other R. The jetting seems to be pretty close to what it was on the PJ. Main is a little bit leaner and pilot a little bit richer by about 1 size each and thats it. Any ideas ?
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  2. 10-20-2006, 03:26 PM #2
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    Dammit!
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    Are your reeds in good shape?
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  3. 10-20-2006, 03:28 PM #3
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    SYKO
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    reeds? fuel inlet clogged on the carb? choke stickin? I hate weird carb problems
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  4. 10-20-2006, 03:31 PM #4
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    I'd guess the reeds are in good shape, it ran fine pretty much with the other carb before the choke incident. Inlet on the carb is good, get good fuel flow out of the tank petcock. float doesnt seem to be sticking. I gotta race tomorrow and if i dont get this thing fixed I'm gonna be severely pissed
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  5. 10-20-2006, 03:34 PM #5
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    yea me too!!! errrrrr I dont have naything here to help either
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  6. 10-20-2006, 03:37 PM #6
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    You say you've tried a leaner pilot. What sizes did you try? 55 just seems big to me. I'm running a 52 in a 38mm pwk just for comparisons sake. I think I could probably go down to a 50.

    Also, I know what you mean when you say it doesn't "feel" rich. I've gone the wrong direction with jetting before too because it doesn't feel right. Sometimes when you go one way and it doesn't improve you gotta go against your gut and try the other one.
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  7. 10-20-2006, 04:01 PM #7
    X2guy
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    I have a 42 pilot and a 178 main in my 40mm PWK. I'd say go leaner on the pilot. You will also probably need to go a little richer on the main as a result.
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  8. 10-20-2006, 04:05 PM #8
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    I've been down to a 45 pilot and everything inbetween and the results are the same or worse the leaner you go. I dropped the needle clip all the way to the bottom groove now and it wont run at all. It did crank once but I had to hold it wide open and it wouldn't rev at all. Still running the 150 main...
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  9. 10-20-2006, 04:12 PM #9
    X2guy
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    Your clip is in the bottom groove? The groove closest to the point of the needle? This pulls the needle up out of the main jet. If this is so you have actually made it more rich.
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  10. 10-20-2006, 04:15 PM #10
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    yes, its at the richest setting beacause the way it was running it felt lean, but now it wont run at all. So I guess my "feeling" aint to good.
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  11. 10-20-2006, 04:37 PM #11
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    86waterpumper
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    I agree with what a few others have said billy, that is a huge pilot for that carb. My gas gas 300 has a 38mm pwk, and most of these run between a 42 and 45 pilot. The pwks also seem to be notorious for having a issue with the non replaceable needle seat wearing, like this thread talks about might be worth checking out

    http://www.smackovermotorsports.com/...pwk+needle+jet

    you ought to find you a lectron haha I love the one on my R, but that's because soemone else who knew what they were doing jetted it lmao jetting on a two stroke is definately a art I haven't got down yet by any means.
    73 cr250m elsinore, 85 atc70, 85 250r flattracker, 87 250es bigred, 86 tecate, 2004 gas gas de300
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  12. 10-20-2006, 04:44 PM #12
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    The O-Ring in the choke assembly good?
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    Quote Originally Posted by mywifeknowseverything
    Just hit the Freakin Gas and Hold on!!!!!
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  13. 10-20-2006, 04:55 PM #13
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    well I dropped the pilot back down to a 48, and put the needle at the leanest posistion and it still wont even fart. Replaced the plug, have fire. Bowl is filling with fuel...Maybe I'll go see if I can put the old carb back on, hell I dont know.
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  14. 10-20-2006, 04:55 PM #14
    Pete
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    air leak? I'd spray some WD-40 around to see if there is an airleak somewhere.
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  15. 10-20-2006, 05:41 PM #15
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    Well I cant get it to do *Edited**Edited**Edited**Edited* now. I've got spark, got fuel, got comrpession. I even tried a small shot of starting fluid and it wont pop off. Plug is semi-wet so fuel is getting into engine. I guess I'm out for tomorrow
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